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99.7 MW BESS operating in San Luis Obispo, CA — California Independent System Operator
99.7 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Coordinates
35.0064, -120.4537
County
San Luis Obispo, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Caballero CA Storage LLC | — | — |
| Owner(s) | Caballero CA Storage LLC | — | — |
| Status | Operating | — | — |
Caballero is a 99.7 MW battery energy storage system (BESS) located in San Luis Obispo County, California. The facility, which began operating in 2025, is owned and operated by Caballero CA Storage LLC. It consists of a single generator utilizing battery technology with a storage duration of 4 hours. The plant is connected to the California Independent System Operator (CAISO) balancing authority within the Western Electricity Coordinating Council (WECC) NERC region.
The Caballero facility is ranked as the 113th largest power plant in California out of 300, and 515th nationally out of 1205. News coverage of the plant includes 4 articles related to regulatory matters, 3 related to grid issues, and 3 covering industry topics.
Generated from EIA, GEM, and public data sources
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
−1.6K MWh
Net Charging
-17.1K MWh
Annual Net Energy
-2.6%
Capacity Factor
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $135.7M
Market Position
ISO/RTO Market
CAISO
LMP Node
MESA-PGE_1_N036
Pricing Hub
TH_ZP26_GEN-APND
Alt. Hub / Zone
TH_SP15_GEN-APND
Location Type
Pricing Node
Node Source
Curated node match
Last updated 2026-03-26
View all articlesNo ask pi reports yet for this entity.
ask pi about CaballeroCalifornia Independent System Operator (CISO)
Grid Voltage
230.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP